Here's what rhymes with thirtcenth.
tenth Words that almost rhyme with thirtcenth
sense hence thence fence hens fens defence defense dense lens offence whence offense tense tens pence pens dens gens hems immense stems dispense incense cleanse gems glens halfpence expense intense commence suspense pretense theorems sixpence harems twopence commonsense condense morphemes condemns frankincense recommence recompense health death wealth breath depth breadth stealth neath length twelfth strength shibboleth commonwealth